Objective: To evaluate the application effect of a plastic head brake device after radical resection of oral malignant tumors and flap repair for defects. Methods: 2018-2019 years, 5 months Sun Yat-sen Memorial patients oral and maxillofacial surgery for oral malignant tumor resection surgery period skin flaps hospital 150 patients randomly divided into groups. Test groups 70 examples and the control group of 80 cases, two different head braking methods were used. The experimental group used a self-designed head brake device, which was prepared to suit the height of the patient before operation. It was used from 0 to 3 days after operation. After the operation, the head lateral range was adjusted according to the braking requirements, and the pillow height was adjusted. The control group wrapped a 500 g salt bag with a treatment towel on both sides of the patient's head for head braking. The incidence of flap vascular crisis, head and neck deviation, head occipital pressure ulcer incidence and patient comfort during braking were evaluated in both groups. Results: The occurrence of vascular crisis in patients with oral tumors was significantly correlated with the patient's gender, alcoholism, and head movement (P<0.05), and the movement of patients' head and neck was also significantly correlated with the occurrence of vascular crisis. Compared with the control group, the experimental group had significant differences in head and neck deviation, incidence of vascular crisis, incidence of head ulcer pressure ulcers and patient comfort (P<0.05). Conclusion: The degree of head movement and incidence of vascular crisis in patients Closely related. Mouldable head brake device has more than ordinary salt bag ProA better head and neck braking effect can significantly reduce the incidence of postoperative vascular crisis, improve patient comfort, and have a better clinical application effect. In addition, this device can also be used repeatedly, reducing economic costs and better improving the satisfaction of doctors, nurses and patients.